*{
    margin: 0;
    padding: 0;
}
.pinglun{                    
    .rev{
        width: 800px;
        margin: auto;
        .con{
            width: 100%;
            height: 1000px;
            border: 1px solid #ccc;
            margin: 20px auto;
            padding: 10px;
            box-sizing: border-box;
            list-style-type: none;
            overflow: auto;
            li{
                margin: 10px 0;
                padding: 5px;
                line-height: 2;
                border-radius: 5px;
                clear: both;
                display: flex;
                flex-direction: column;
                align-items: flex-end;
            }
        }
        #text{
            height: 80px;
            display: block;
            margin: auto;
            margin-top: 20px;
            width: 100%;
        }
        #btn{
            width: 80px;
            height: 30px;
            border: 1px solid #ccc;
            float: right;
            margin-top: 10px;
        }
    }
    .ret{
        text-decoration: none;
        color: rgb(240, 133, 133);
        font-weight: 900;
        position: fixed;
        right: 0;
        top: 300px;
        width: 50px;
        height: 50px;
        background: rgba(60, 161, 255, 0.459);
        text-align: center;
        line-height: 50px;
        border-radius: 4px;
    }
}